Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication
Lesson details
Learning outcome
I can use expanded and short multiplication to multiply 2-digit by 1-digit numbers.
Key learning points
- Use times tables and place value to estimate the product of a 2-digit by a 1-digit multiplication.
- Use expanded short multiplication to multiply a 2-digit by a 1-digit number.
- Use short multiplication to multiply a 2-digit by a 1-digit number.
Keywords
Estimation - To find a value that is close enough to the right answer, usually with some thought or calculation involved is known as estimation.
Common misconception
Pupils may find it difficult to identify the multiples of 10 a number is between when estimating.
Provide a number line and continue to use stem sentences to support pupils in their thinking.
Teacher tip
Estimation is a key skill and should be modelled clearly, with pupils encouraged to use estimation at every opportunity. Take time to model your 'thinking aloud' process while estimating.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.483 can be partitioned as __________.
Q2.Izzy is chanting her 7 times tables: ... 21, 28, 35, ___. What comes next?
Q3.Izzy is chanting her 7 times tables in descending order: ... 77, 70, 63, . What comes next?
Q4.Use short multiplication to calculate this question: 56 × 3 =
Q5.Use expanded multiplication to calculate this question: 74 × 5=
Q6.Sam has 71 shiny cards, Izzy has 213 shiny cards. Izzy has times as many.
Assessment exit quiz
6 Questions
Q1.To estimate for the calculation: 4 × 72, 72 is between __________.
Q2.Select the correct number to complete the estimation.
Q3.Write the correct number to complete the estimation.
Q4.Select an appropriate estimation for 63 × 3
Q5.Use estimation to decide which has a suitable answer for this multiplication: 46 × 3
Q6.Solve the worded problem using short multiplication: In one month 34 cups of lemonade are sold. The following month, six times as many are sold. How many cups of lemonade were sold that month?
To help you plan your 5 maths lesson on: Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your 5 maths lesson on: Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Multiplication by partitioning leading to short multiplication (2 by 1-digit) unit, dive into the full primary maths curriculum, or learn more about lesson planning.